Pipe wrench



C. A. DANIEL PIPE WRENCH Filed March 7, 1955 Fig. .2

Charles A. Daniel INVENTOR.

United States Patent ce Patented $112112 PIPE WRENCH Charles A. Daniel, Strykersville, N. Y.

Application March 7, 1955, Serial No. 492,378

3 Claims. (CI. 8153) The present invention relates to new and useful improvements in wrenches designed particularly for use on pipes or other tubular work to be gripped and turned.

An important object of the invention is to provide a wrench equipped with a plurality of movable gripping jaws to engage the work with varying degrees of pressure under control of the operator, to adapt the wrench for use with plastic or other relatively fragile tubing adaptors to eliminate the tendency of the adaptor to contract and bind or break by the pressure of the wrench during tightening or loosening thereof.

Another object is to provide a tool of this character of simple and practical construction, which is strong and durable, efiicient and reliable in operation, easy to manipulate, relatively inexpensive to manufacture and otherwise well adapted for the purpose for which the same is intended.

These together with other objects and advantages which will become subsequently apparent reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawing forming a part hereof, wherein like numerals refer to like parts throughout, and in which:

Figure 1 is a plan view;

Figure 2 is a side elevational view;

Figure 3 is a perspective view of the movable jaw opening and closing member;

Figure 4 is an enlarged fragmentary sectional view taken on a line 4-4 of Figure 1; and,

Figure 5 is a fragmentary perspective view of one of the pressure adjusting jaws.

Referring now to the drawing in detail, wherein for the purpose of illustration I have disclosed a preferred embodiment of my invention, the numeral 5 designates a main handle having a crescent-shaped extension 6 fixed at one end.

A plurality of movable jaws 8 are each formed with a U-shaped or bifurcated arm 9 to receive the extension 6 and are pivoted to the latter by rivets or the like 10 to swingably connect the movable jaws in substantially equally spaced-apart relation to each other internally of the extension 6. The free ends of the movable jaws are formed with an undulated work-gripping face 11 to effectively engage tubing adaptors 12 or other work of different diameter.

The jaws 8 are uniformly and simultaneously actuated in an opening and closing movement by means of an arcuate member 13 positioned at one side of the extension 6 and member 13 is connected to the arms 9 of each of the movable jaws by rivets or other suitable pivots 14.

A Y-shaped handle 15 is pivoted at its crotch portion to the central portion of the extension 6 by a rivet or the like 17 and with the stem portion 18 of the handle connected to the member 13 by a rivet 19. The diverging A coil spring 24 is placed between head 22 and handle 5 to return the jaws 8 to an open position.

From the foregoing, the construction and operation of the device will be readily understood and further explanation is believed to be unnecessary. However, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction shown and described, and accordingly all suitable modifications and equivalents may be resorted to, falling within the scope of the appended claims.

What is claimed as new is as follows:

1. A wrench comprising a handle having a fixed crescent-shaped extension, a plurality of coacting jaws pivoted to the extension internally of the latter, an arcuate member positioned in side-by-side concentric relation with respect to the crescent-shaped extension and connecting the pivoted jaws to each other for simultaneously opening and closing movement, and manipulating means for the arcuate member, said manipulating means being supported by the handle and connected to the arcuate member for rotating the latter to effect an opening and closing movement of the pivoted jaws.

2. A wrench comprising a handle having a fixed crescent-shaped extension, a plurality of coacting jaws pivoted to the extension internally of the latter, an arcuate member positioned in side-by-side concentric relation with respect to the crescent-shaped extension and connecting the pivoted jaws to each other for simultaneously opening and closing movement, and manipulating means for the arcuate member, said manipulating means including a lever pivoted to the handle and connected to the arcuate member for rotating the latter to effect an opening and closing movement of the pivoted jaws.

3. A wrench comprising a handle having a fixed crescent-shaped extension, a plurality of coacting jaws pivoted to the extension internally of the latter, an arcuate member connecting the pivoted jaws to each other for simultaneously opening and closing movement, and manipulating means for the arcuate member, said manipulating means including a Y-shaped lever pivoted to the handle and connected at its stem portion to the arcuate member for rotating the latter to effect an opening and closing movement of the pivoted jaws, and said lever having diverging lever portions positioned at opposite sides of the handle for oppositely actuating the pivoted jaws by pressure subjected to the respective diverging lever portions.

References Cited in the file of this patent UNITED STATES PATENTS 701,237 Wight May 27, 1902 1,106,198 Everett -1 Aug. 4, 1914 1,531,377 Clarke Mar. 31, 1925 1,895,638 Melling Jan. 31, 1933 2,575,950 Fredholm Nov. 20, 1951 2,659,257 Thompson Nov. 17, 1953 

